Door-closing apparatus



Feb. 14, 1928.

R. L. JEWELL DOOR CLOSING APPARATUS Filed Nov: 25, 1925 A TTORNEYS.

Patented Feb. 14, 1928.

UNITED STATES FATE-NT oerce.

RAYMOND L. JEWELL, F MILLCREEK TOWNSHTP, ERIE COUNTY, EENNSYLVANIA, AS- SIGNOR TO. AMERICAN STEBILIZER COMPANY, OF ERIE, PENNSYLVANIA, A GOR- rona'rron or rENNsYLvANIA.

noon-onosme.AI i'ARATUs.

Application filed November 25, 1925. Se-a1 No. 71,479.

devices as heretofore lnade comprise a head carrying the inner ends of the levers and this has been trictio'nally connected with the .nutinoving the inner ends of the levers axially. The frictional engagement has swung the inner enos oft-he levers radially to move the outer ends or the levers to their setting position and the continued action of they nut against the friction hCCODllJliShiIlg the axi a1 movement. the operator must overcome the trictioniu the. continued action of the nut, or itthe lfriction is made comparatively light the movement of the levers is rendered uncerrain. WVith the present device this preliminary, rotating movement offthe levers is l lOSl'LlVElY performed automatically as the nut is rotated with the preliminary nioveiuc'ot andthe release taltes place in a like manner. Thus there is a certainty o'l operation of the levers and the operation otthe nut is relieved ofthe frictional resistance. l raitures and details of the invention will appear from thespecification and claims.

The invention is illustrated in theaccoinpanying drawings as follows':

Fig. 1 shows a section on the line 1-l in Fig. 2..

Fig. 2 afront elevation of the door partly in section Ont-he line 2 2- in Figure 1.

Fig. 3 a central section of the locking mechanism on the lines in Figs. 1 and 2'.

' Fig. t is a detail or the operating head.

1 marks the sterilizer chamber Walls, 2 the head on the wall, 3 the door'seating in the annular seat 4 of the head. The head is provided with an annular hook 5 which engages the ends of the pressureexerting le vers (-3, Th se levers are tulcruined on a ring '7 on the head andsecured in place by straps 9, the strapsheing secured to the ring 7 by screws 9, the screws-extending into round posts 9 onthe ring 7 afliording clearance for the angular movement of the fulcrum levers as they are inovedint-o and out of position underthe hook as hereinafter described. The door may he inovedto and from its seat byany convenient mechanism ordinarily involving a hinge (not shown).

The levers 6 have spherical inner ends 6 and theseare arranged in bearing sockets in a head 10, the head being formed in two parts secured together by pins 10. The

head 10 is rotatively mounted on a nut "11,

the nut being provided with radially arranged handles 12. The nut is screwedlon to a post 13 extendingtroin the door and having a screw-threaded end 14. VVlth this structure, therei'ore,

The nut is pr0v1ded with a series of receive a latch 16. The latch islpivotal-ly mounted on a pin 17 between fingerslS. The fingers 18 extend inwardly from the head 10. The outer end ofthe latch is yield- ;ingly forced inwardly by the action of a spring 19 operating onthe'oppos te end of thelateh, the SlJPlDgdJGlIlgliIlQliUl'Qd, on a bridge plate 20 on, ng the lingers .1 8 on the h d 10. i

it janrplate 21 is mounted on the door. This provided with an annular cant 22 which isada-pted to engage the inner end of the latch 16 with the lovers approximately in their finalror radial position, as shown in Fi g. 2 and with the nut retracted so as to lift the latch above the retarding ring 24 hereinafter described (see Fig. 2). [The latch is limited in its movement in a reverse directionby a stop 21 on the plate 21. lWhen swung to this positionthelevers 6 will be drawn out of the true radial position towa rd a tangent to their socket connection and will thus be withdrawn from thehook 5.

f The operation of this part ofthe' mechanism is as follows: Starting with the latch against the stop 9 1 the door is putin place, the nutis turned in a direction to set the levers. l.he latclr being in, the notches 15 outwardly under the hooked flange 5.

r the the head 10 is locked with the nut as clearly indicated in Figs. 2 and 3 and consequently the inner ends of the levers are swung rotatively moving the outer ends of the levers lass the latch reaches the cam 22 the further movement of the nut with the latch forces the inner end of the latch inwardly and the outer end of the latch 16 outwardly to clear the walls of the notches 15. The nut is then screwed in by turning the handles 12 and as it is screwed in it forces the outer ends of the levers 6 inwardly and the outer ends of the levers outwardly against the hook 5 sealing door. The movement of the latch after the e11- gagement with the cam 22 carries the inner ends of the lovers 6 slightly beyond the desired position and as the nut forces the head 10 inwardly it carries with it the fingers 18. Due side oithe finger engages a cam 23 extending outwardly from the plate 21 which :lorcihly rocks the head 10 in a reverse direction so as to finally position the lovers in their radial or desired position. This positioning olthe latch mechanism throughthe fingers 18 on the cam 23 is desirable so that as the nut is screwed outwardly in releasing the door carrying with itthe head and latch 16 the latch will be in position when the nut has reached a releaseposition as shown in Fig. 3 to permit the inner end of the latch 16 to swing over the retarding ring 24:. It will be understood that as the head moves inwardly the inner end of the latch is in engagement with the retarding shoulder 24 so as to loclrthe latch 16 out of the notch 15 until the nut is again brought outwardly to the position shown in Fig. 2 so that with the initialreturn movement of the nut the latch is held out of the notches 15 until the nut has moved outwardly a sufficient distance to bring the levers to a position releasing pres sure on the door and the flange 5. At this point the latch snaps oit oi the ring 24.- and piclrs up the first notch as it passes with the nut and swings the head. 10 in a return direction until the stop 21 is reached. This return swinging of the head swings the inner ends of the levers rotatively and draws the outer ends of the levers inwardly to clear the flange 5.

iVhat I claim as new is l. Ina door closure apparatus, the com- I hination of a door; a lever pressure system on the door comprising a rotative lever actuating head; a post on which the head is mounted; a nut screwed on the post actuating the. head; and devices positively locking the head with the nut to swing the levers.

2; In a door closure apparatus, the combination of a door; a lever pressure system on the door comprising a rotative lever actuating head; a post on which the head is mounted; a nut screwed on the post actuatlug the head; devices positively lot-king the head with the nut to swing the levers; and means releasing said devices permitting the continued movement of the nut to set the lovers.

3. in a door closure ap iaratus, the comhination of a door; a. lever pressure system on the door comprising a rotative lever actuating head; a post on which the head is mounted; a nut screwed on the post actuating the head; devices positively locking the head with the nut to swing the levers; and means automatically releasing said devices permitting the continued movement of the nut to set the levers.

4-. In a door closure apparatus, the com hiuation ot a door; a lever pressure system on the door comprising a rotative lever actuating head; a post on which the head mounted; nut screwed on the post actuating the head; devices positively locking the head with the nut to swing the lovers; and means actuated through the turning of the nut automatically releasing said devices pcrmitting the continued movement of the nut to set the levers.

5. In a door closure apparatus, the co1nhination of a door; a lever pressuresystem on the door comprising a rotative lever actuating head; a post on which the head is mounted; a nut screwed on the post actuating the head; and devices comprising a latch mounted on the head positively locle ing the head with the nut to swing the levers, and a cam on the door acting on the latch to release the same with the turning oi. the head.

6. In a door closure apparatus the combination of a door; a lever pressure system on the door comprising a. rotative lever actuating head; a post on which the head is mounted; a nut screwed on the post actuating the head; devices positively locking the head with the nut to swing the levr means :mtomatically releasing said devices permitting the continued movement of the nut to set the levers: and li'luil'lillllSIl] retarding the re-loching of the devices on the return movement of the nut.

7. In a door closure apparatus, the comhination of a door; a lever pressure system on the door comprising a rotative lever actuating head; a post on which the head is mounted; a nut screwed on the post actuat ing the head; devices comprising a latch mounted on the head positively locking the head with the nut to swing the levers, and a. cam on the door acting on the latch. to release the same with the turning of the head; and means returning the head to position the lovers as the nut advances.

8. In a door closure apparatus, the combination of a. door; a lever pressure system on the door comprising a rotative lever actuating head; a post on which the head is tarding ring into which the latch is moved as the nut advances, and a cam operating 10 on the head moving the head in a return direction as it is advanced under the influence of the nut.

In testimony whereof I have hereunto set my hand.

RAYMOND L. J EVVELL. 

